Coil ID - Washington 1¢

both WMK 190
Flat Plate - ink on reverse
Size 19 X 22
Overall height 24.5
Perfs between 9.7 & 10.3



*** Edited by Staff to clarify topic title. Titles are important! ***

Sure I'll take a guess - How about 443 & 444

443, 444 would be the obvious choice but considering the forgeries, I wonder about these.
The 444 looks good, the 443???

On the 2 measure the height (edge to edge) should be 25mm, or perhaps range a bit from 24.75 - 25.15mm. If its too short could be a trimmed 425, 425e would have the watermark running in the wrong direction and a 409 would have to be re-perfed on both sides. I think that's all the options?
The same logic applies to the 443 - using 424 424d and 408.
Also are the straight edges parallel, any waviness along the edges-check with straight edge.

The perforations of both look OK. Most faked used coils are trimmed sheet stamps. Trimmed and reperforated booklet pane singles are very uncommon but do exist. The imperf edges look potentially OK. To be sure, match the top and bottom edges at 1200 DPI or above to verify that they are parallel to within about 0.001 inch (0.025 mm). Using height alone as the criteria for validating coils is fraught with pitfalls. For some reason, 5 cent flat plate coils are often quite short making the 25 mm criteria less than useful.

Clark